CN201158605Y - Swinging bed/activated sludge process series arrangement - Google Patents
Swinging bed/activated sludge process series arrangement Download PDFInfo
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- CN201158605Y CN201158605Y CNU2008200787074U CN200820078707U CN201158605Y CN 201158605 Y CN201158605 Y CN 201158605Y CN U2008200787074 U CNU2008200787074 U CN U2008200787074U CN 200820078707 U CN200820078707 U CN 200820078707U CN 201158605 Y CN201158605 Y CN 201158605Y
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- activated sludge
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- 238000000034 method Methods 0.000 title claims abstract description 56
- 239000010802 sludge Substances 0.000 title claims abstract description 56
- 230000008569 process Effects 0.000 title claims abstract description 53
- 230000009182 swimming Effects 0.000 claims abstract description 27
- 239000000945 filler Substances 0.000 claims abstract description 26
- 238000006243 chemical reaction Methods 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000000926 separation method Methods 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000010865 sewage Substances 0.000 abstract description 21
- 238000005273 aeration Methods 0.000 abstract description 7
- 238000012856 packing Methods 0.000 abstract description 6
- 238000004062 sedimentation Methods 0.000 abstract 2
- 238000003541 multi-stage reaction Methods 0.000 abstract 1
- 238000005192 partition Methods 0.000 abstract 1
- 239000002002 slurry Substances 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 description 20
- 230000003647 oxidation Effects 0.000 description 18
- 241000894006 Bacteria Species 0.000 description 15
- 230000000694 effects Effects 0.000 description 12
- 230000000813 microbial effect Effects 0.000 description 12
- 244000005700 microbiome Species 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 8
- 230000008901 benefit Effects 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 230000002950 deficient Effects 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 4
- 238000006731 degradation reaction Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000001228 trophic effect Effects 0.000 description 4
- 230000001651 autotrophic effect Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000000050 nutritive effect Effects 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- 239000002028 Biomass Substances 0.000 description 2
- 241000108664 Nitrobacteria Species 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000004071 biological effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 206010067868 Skin mass Diseases 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005276 aerator Methods 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 210000005056 cell body Anatomy 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000007849 functional defect Effects 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000011499 joint compound Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000007102 metabolic function Effects 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000006213 oxygenation reaction Methods 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000000247 postprecipitation Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000012763 reinforcing filler Substances 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The utility model discloses a swimming bed/activated sludge process-based series connection device and relates to the field of biological sewage treatment. The device comprises an inlet water tank (1) connected with a liquor flow meter (3) via an inlet water pump (2). The inlet water flows into a multi-stage series-connection reaction tank. After the multi-stage reactions, the slurry enters a sedimentation tank (11) for mud-water separation. The treated water flows out of the sedimentation tank. The device is characterized in that: the multi-stage series-connection reaction tank comprises a swimming bed (7) formed by packing a filler (9) in a first-stage reaction tank and activated sludge tanks (8) taken as subsequent reaction tanks. A flow-guide plate (10) is arranged in the vertical direction inside the multi-stage series-connection reaction tank. An aeration device (6) is arranged on one side of the flow-guide plate. An upward flow zone is formed on one side of the aeration device and a downward flow zone is formed on the other side of the aeration device, thereby forming an internal circulation. The flow-guide plate is a partition with through-holes (14) respectively arranged in the upper and the lower parts thereof. The device has simple structure, is flexible in changing operation mode and increasing treatment capacity, and is suitable for the treatment of sewage with instable quality and flow.
Description
Technical field
The utility model is a kind of high-efficiency sewage biological treatment device, in order to handle the various sewage that contain organic pollutant and ammonia nitrogen, relates to the biological sewage treatment field.
Background technology
The known technology activated sludge process in 1914 since pilot plant is set up in Manchester of Britain, the applicating history of existing last 100 years, along with widespread use in the actual production and technical continuous innovation improve, on the basis of traditional active sludge treatment system, developed the technology of many improvement or distortion, also carry out nitration reaction simultaneously with the organism in the efficient removal sewage, and can satisfy different performance requriementss gradually, these technologies are in the aeration form, aerator, sludge retention time, operational mode progressively is improved with aspects such as denitrogenating ability, activated sludge process and deformation technique thereof have been widely used in sanitary sewage at present, in municipal effluent and the organic property trade effluent, become the main body sewage disposal technology.But traditional activated sludge process also exists some relatively distinct issues.Traditional activated sludge process exists defectives such as mud is easy to expand, surplus sludge volume is big, MLSS is low.
The known technology biological contact oxidation process from 1971 since Japan starts, this technology is widely used and studies over more than 30 year.The purification mechanism of biological contact oxidation process is identical with general biomembrance process, and from microbial growth mode and place, biological contact oxidation process is similar to the biological filter; From hydrodynamic characteristic and aeration mode, biological contact oxidation process is similar with activated sludge process again, so it has the advantage of filter tank method and conventional activated sludge process concurrently.The typical technical process of biological contact oxidation process as shown in Figure 1, filling filler in contact-oxidation pool, the whole fillers of sewage submergence, and with certain flow velocity filler of flowing through, be covered with microbial film on the filler, sewage frequently contacts with microbial film, under the effect of microorganism metabolic function on the microbial film, pollutants in sewage obtains removing, and has realized the purification of sewage.
The core of biological contact oxidation process is a biologic packing material, and it is biomembranous carrier, and sewage purification process is exactly the metabolic processes that is attached on the filler and is suspended in the microorganism between the filler.The characteristic of filler plays an important role to the utilization ratio of biomembranous proterties, oxygen and waterpower distribution occasion etc., is the key factor that directly influences bio-contact oxidation art breading effect.The filler that is applied to biological contact oxidation process at present mainly contains particulate filler (as slag, zeolite, baton round, fibrous nodules), honeycomb filler, soft cellulose filler, semi soft packing and combined stuffing etc.Various fillers are because of the difference of its material, character, specific surface area, voidage, and directly influence biofilm, microorganism growth, coefficient of oxygen utilization etc.Well behaved filler should have the feature that comprise following several respects.
(1) microbial film is evenly distributed, and deposition and clustering phenomena do not occur;
(2) voidage is bigger, is difficult for producing latch up phenomenon;
(3) chemistry is stable with biological property, has stronger erosion resistance, can be in the medium-term and long-term immersion of sewage;
(4) have certain resistance to compression, tensile strength, long service life;
(5) have bigger specific surface area and wetting ability, be beneficial to biomembranous apposition growth;
(6) oxygenation capacity is preferably arranged, cut down the consumption of energy.
Compare with activated sludge process, that biological contact oxidation process has is stable, surplus sludge volume is little, management is simple,, the outstanding advantages such as variation that can adapt to big water quality scope strong to ammonia nitrogen and difficult degradation contaminant removal capacity.If select that specific surface area is big, voidage is high for use, certain intensity and toughness arranged, hydrophilic soft-filler, the adhesion property of reinforcing filler, improve active biomass that reactor retains, improve biomembranous biological activity, just can reduce the floor space of reactor greatly, realize the efficient processing of sewage.
Activated sludge process and biological contact oxidation process all have advantage separately, but defectives such as the mud that traditional activated sludge process exists is easy to expand, surplus sludge volume is big, MLSS is low, there are defectives such as biomembrane activity is not high, the easy obstruction of microbial film in biological contact oxidation process, if biological contact oxidation process and activated sludge process are together in series, realize the combination of biomembrance process and activated sludge process, can strengthen the processing power and the stability of activated sludge process on the one hand, solve the problem that activated sludge process exists; Can save the dosage of bio-carrier on the other hand.Because the series connection of apposition growth biomembrance process and suspension growth activated sludge process, can realize the difference in functionality microbial growth, form easily from low trophic level bacterium to former, the metazoal longer abundance of food of high trophic level, therefore to the material switching process of high trophic level microorganism, realize the loss of ability from low trophic level, and then realizing the mud decrement effect.Because biomembranous existence is beneficial to long, the speed of growth growth of nitrobacteria slowly generation time, realized separating of the biosolids residence time and hydraulic detention time, system still can keep very strong nitrification effect under short HRT.Therefore,, can remedy both functional defects, and have both advantages concurrently, help realizing the wastewater treatment efficiency of efficient stable if biological contact oxidation process and activated sludge process series connection are come.
The utility model content
Defectives such as the mud that exists at traditional activated sludge process is easy to expand, surplus sludge volume is big, MLSS is low, there are defectives such as biomembrane activity is not high, easy obstruction in biological contact oxidation process, the utility model provides a kind of biological contact oxidation process and the placed in-line combined process mode of activated sludge process, it is swimming bed/activated sludge process plural serial stage device, have both advantages concurrently, grow the generation time with microbial diversity, food chain length, active height, microbial survival, settling property is good, be easy to characteristics such as maintenance operation and management.
The swimming bed that the utility model provides/activated sludge process plural serial stage device, as shown in Figure 2, comprise that successively inlet flume 1 connects liquid meter 3 by intake pump 2, intake in the reactive tank of plural serial stage, through behind the reaction of high order, muddy water enters settling tank 11 and carries out mud-water separation, and treating water is discharged from settling tank 11;
It is characterized in that the reactive tank of above-mentioned plural serial stage is set to: filler 9 is filled in first step reactive tank and forms swimming bed 7, and the subsequent reactions groove is an activated sludge tank 8, and swimming bed 7 and activated sludge tank 8 are together in series and form swimming bed/activated sludge process tandem arrangement.
In the vertical direction is provided with flow deflector 10 in the reactive tank of above-mentioned plural serial stage, in a side of flow deflector 10 aerating apparatus 6 is set, and forms the up-flow district in the side that aerating apparatus 7 is set, and an other side is for falling the stream district, the formation internal recycle; Wherein flow deflector 10 is the upper and lower dividing plate that respectively leaves through hole 14.
The filler 9 that is filled in the first step reactive tank adopts the hydrophilic polyacrylic fibrous packing.
Filler 9 is filled in the swimming bed 7 of first step reactive tank formation, collision has taken place and has contacted with the microbial film of filler and top apposition growth thereof in the internal recycle current, concurrent and multiple incorgruous stream have been produced, make bio-carrier and microbial film be in " swimming " state, this " swimming " state has kept biomembranous greater activity, can not make simultaneously that biofilm development is blocked up also to be unlikely to make the microbial film big area to come off, the stability that has kept the microorganism chain, SRT and HRT have been separated in biomembranous in addition existence, it is long to be beneficial to generation time, rate of propagation is the good growth of nitrobacteria slowly, guarantees the very strong nitrification effect of technology under shorter HRT condition.
In activated sludge tank 8, can be by dividing plate being set or the internal recycle that one-sided bottom aeration is realized current being set, help contacting of pollutent and microorganism flco, simultaneously also help in groove, retaining higher biomass, can improve its processing power on the one hand, also can alleviate the solid loading in post precipitation pond on the other hand, can reduce the floor space of settling tank.
The plural serial stage of swimming bed and activated sludge process helps the growth respectively of the dominant bacteria of difference in functionality, avoid the absolute predominance that heterotrophic bacterium in the single-stage reactor or autotrophic bacteria occupy and suppressed the other side's growth, can in grading reactor, realize the growth of dissimilar dominant bacterias according to the supply situation of nutritive substance, better to the removal effect of pollutent; Simultaneously in single-stage reactor owing to microorganism has suppressed the decomposition of microorganism to other hard-degraded substance to the preferential degraded of easily biodegradable organics such as low molecular organic acids, glucose etc., and in staged reactor, utilize the heterotrophic bacterium of the substrate of easily degrading to be present in respectively in the different reactive tanks, so removal effect of organic matter is better more thorough with the heterotrophic bacterium that utilizes the difficult degradation substrate.
The utility model swimming bed/activated sludge process tandem arrangement is applied to the advantage that sewage disposal has and is:
(1) realized the current internal recycle by the one-sided aeration of reactor being set and flow deflector 10 being set, kept filler and apposition growth thereof biomembranous " swimming " state in the packing area, biomembranous high reactivity and longer food chain have been kept, biomembranous existence simultaneously makes SRT and HRT separate, and helps length generation time, rate of propagation microorganism growth slowly.
(2) the current internal recycle has guaranteed that nutritive substance contacts with the high frequency of microorganism, is beneficial to the efficient removal of nutritive substance.
(3) the current internal recycle is beneficial to and retains a large amount of biomasss in the reactive tank, can improve processing power on the one hand, can alleviate the solid loading of settling tank on the other hand, reduces the floor space of settling tank.
(4) plural serial stage device layout helps distribution and the growth of difference in functionality bacterium, can avoid the restraining effect of the heterotrophic bacterium of dramatic growth to autotrophic bacteria in the dirt of high C/N ratio, waste water, heterotrophic bacterium can be realized in different reaction order the nitrated of ammonia nitrogen with autotrophic bacteria the degraded of substrate; The heterotrophic bacterium of Different Nutrition condition may reside in the different reactive tanks as heterotrophic bacterium that utilizes easy degraded substrate and the heterotrophic bacterium that utilizes the difficult degradation substrate simultaneously, and therefore organic degradation effect is better.
Description of drawings:
Fig. 1. be canonical biometric catalytic oxidation setting drawing.
Fig. 2. be swimming bed of the present utility model/activated sludge process tandem arrangement synoptic diagram.
Fig. 3. be the structural representation of flow deflector 10.
Among the figure: 1-inlet flume; 2-intake pump; 3-liquid meter; 4-air compressor; 5-gas meter; 6-aerating apparatus; 7-swimming bed; 8-activated sludge reaction groove; 9-filler; 10-flow deflector; 11-settling tank; 12-sludge reflux pump; The 13-contact-oxidation pool; The 14-through hole.
Embodiment
Be further described below in conjunction with accompanying drawing 2 and 3 couples of the utility model embodiment of accompanying drawing.
Accompanying drawing 2, swimming bed of the present utility model/activated sludge process plural serial stage device comprises swimming bed 7 and activated sludge reaction groove 8, flow deflector 10 vertically is divided into the up-flow district with single groove left and right sides and falls the stream district, air compressor 4 connects aerating apparatus 6 by gas meter 5, aerating apparatus 6 is arranged on the bottom in up-flow district and has created the current internal recycle, and filler 9 produces " swimming " state under the internal recycle flow action.Sewage by intake pump 2 and liquid meter 3 with 1: 1-1: 5 volume integral mixing ratio enters into swimming bed 7 and activated sludge reaction groove 8, settling tank 11 mud also enter in the swimming bed 7 by reflux pump 12 simultaneously, mud, water, gas pass through certain circulation in single groove after, part mud and water enter in the subsequent reactions groove, through behind the reaction of high order, muddy water enters settling tank 11 and carries out mud-water separation, and treating water is discharged from settling tank 11.
For organic wastewater with medium-low concentration, as city domestic sewage, swimming bed of the present utility model/activated sludge process tandem arrangement can be worked under conventional aerobic condition, realizes the nitrated of organic oxidation and organonitrogen and ammonia nitrogen.
Treatment of Organic Wastewater for high density, can in the activated sludge tank of device of the present utility model, add a certain proportion of filler, the first order reaction groove can be controlled to anoxic, the subsequent reactions groove is controlled to be aerobic, and carry out mixed-liquor return, can realize organic oxidation, nitrification and denitrification.
Main technical details
HRT＝2.5～10h；DO＝2.0～4.0mg/L
Filler: hydrophilic polyacrylic fiber
Embodiment
Real life sewage (pH=7.4～7.8, COD=140～394mg/L, NH with certain school life's sub-district discharging
4 +-N=52～85mg/L) is former water.Selected swimming bed/activated sludge process plural serial stage device is made up of single groove of 5 11L, total useful volume is 55L, first groove is a swimming bed 7, in add that diameter is arranged is the hydrophilic polyacrylic fibrous packing (the system BF of Japanese NET Co., Ltd. filler) of 100mm length 520mm, activated sludge reaction groove 8 after second groove reaches, swimming bed and activated sludge reaction cell body integration proportioning are 1: 4, and it is strong that swimming bed after system formally starts/activated sludge process plural serial stage device processing sanitary sewage has processing power, the microorganism concn height, active high, sludge yield is low, the outstanding features such as anxiety of no sludge bulking.At HRT=3.2h, SRT=9d, DO=2.2～3.7mgL
-1, average COD and NH
4 +The clearance of-N is respectively up to 90.9% and 98.3%; Do not occur the sludge bulking phenomenon in the whole service process, apparent sludge yield is 0.23kg-MLSSkg
-1-COD
Removed(0.33kg-MLVSSkg
-1-BOD
Removed), reduced by 45%～59% than conventional activated sludge method, reduced by 27% than biomembrance process; MLSS concentration height in the device is up to 9000mgL
-1, average out to 4300mgL
-1, be higher than traditional plug-flow active sludge 1000～3000mgL
-1Level, mud=MLVSS/MLSS value 0.82～0.90, average out to 0.87 is higher than ordinary activated sludge and handles 0.75 of sanitary sewage, has higher activity.
Claims (2)
1. swimming bed/activated sludge process tandem arrangement, comprise that successively inlet flume (1) connects liquid meter (3) by intake pump (2), in the reactive tank of the plural serial stage of intaking, through behind the reaction of high order, muddy water enters settling tank (11) and carries out mud-water separation, and treating water is discharged from settling tank;
It is characterized in that the reactive tank of above-mentioned plural serial stage is set to: filler (9) is filled in first step reactive tank and forms swimming bed (7), and the subsequent reactions groove is activated sludge tank (8).
2. device according to claim 1, it is characterized in that: in the vertical direction is provided with flow deflector (10) in the reactive tank of above-mentioned plural serial stage, side at flow deflector is provided with aerating apparatus (6), form the up-flow district in the side that aerating apparatus is set, an other side forms internal recycle for falling the stream district; Wherein flow deflector is the upper and lower dividing plate that respectively leaves through hole (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200787074U CN201158605Y (en) | 2008-01-25 | 2008-01-25 | Swinging bed/activated sludge process series arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200787074U CN201158605Y (en) | 2008-01-25 | 2008-01-25 | Swinging bed/activated sludge process series arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201158605Y true CN201158605Y (en) | 2008-12-03 |
Family
ID=40109198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200787074U Expired - Fee Related CN201158605Y (en) | 2008-01-25 | 2008-01-25 | Swinging bed/activated sludge process series arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201158605Y (en) |
-
2008
- 2008-01-25 CN CNU2008200787074U patent/CN201158605Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081203 Termination date: 20120125 |